1. 用所给词的适当形式填空。

1. （1） I didn't brush my (tooth) this morning.
   

3. （2） Sometimes we should feel (luck) to be alive.

5. （3） Life is full of the(expect)
   

7. （4） I (run)all the way to school yesterday.

9. （5） At the camping site, people sit around the （burn）wood and talk freely.